MOT FAIL!!! Emissions

[Jeff]

in Tenerife no allowance is made for older cars - the emissions test is the same as for new cars.
My Stag therefore failed on an earlier test, but all I did was weaken the mixture (using the special carb tool to do so), and once the test was passed, richened it again so that it ran normally.

Fortunately I only have to have mine tested once every 5 years (not every year), so I have got to year 2019 before the next test is due and I will most probably have to do the same thing again.

So there is an allowance for older cars then Terry, i.e. every 5 years instead of every year in the UK.

Jeff

[Tdm]

So there is an allowance for older cars then Terry, i.e. every 5 years instead of every year in the UK.
Jeff

I was referring to there being no allowance for emissions Jeff, and the last time I had an ITV (MOT) here was in 2014, so my documents say the next one is not due till 2019. It is one of the anomolies of Canarian (Spanish) rules. The wife's Honda is 21 years old, and that has to have an MOT every year. For me the 5 year ITV rule on my Stag came into force when my car was 35 years old, and I stopped paying road tax on it when it was 25 years old.

[Jeff]

I should have put a wink emoji Terry, I was joking.

[bonnietiler750]

Removed the oil from the dampers turned the Needles down 1/3 turn.
Just had retest
Previously 4.5 max reading 7.5
Now 2.15
Job done put a little oil back in the dampers now

[Tdm]

Removed the oil from the dampers turned the Needles down 1/3 turn.
Just had retest
Previously 4.5 max reading 7.5
Now 2.15
Job done put a little oil back in the dampers now

Glad it's now sorted. I had to turn mine down quite a bit to pass the test, and it was almost undriveable being so lean, so as soon as I got it back I richened it again to get a smooth tickover without making it too rich.

Jeff - I kew you were only joking - I know never to take you too seriously!

[Donkey]

The last CT (MOT) on my Stag was just before I purchased it and the reading was 2.03%.
Based on what you've been saying that seems low and it was achieved without alteration.
So, what should one expect from a standard (with EI) running Stag?
There seems a huge variation even given the vagaries of older engines.

Brian

[DJT]

The last CT (MOT) on my Stag was just before I purchased it and the reading was 2.03%.
Based on what you've been saying that seems low and it was achieved without alteration.
So, what should one expect from a standard (with EI) running Stag?
There seems a huge variation even given the vagaries of older engines.

Brian

Triumph went to the trouble of putting a label under the bonnet to remind people. Sadly many are now missing, but they are available from all the usual suppliers: http://www.jamespaddock.co.uk/firing-order-label-3

[Tdm]

Triumph went to the trouble of putting a label under the bonnet to remind people. Sadly many are now missing, but they are available from all the usual suppliers: http://www.jamespaddock.co.uk/firing-order-label-3

Dave - I never knew that - you learn something new everyday. Not seen any such label on my car (I don't think), will have another look under the bonnet just in case I have missed it.

[Jeff]

Should be on the panel above and near the battery Terry.

[markmark2]

Hi all, I'll assume carbs dont wear evenly, so if a car is running rich and the emissions are high and does need adjustment, does each carb emission have to be measured or is it a combination of both. ie, is it possible to adjust only one carb and leave the other to lower the emission if that is poss. Do carbs have to be the same mixture wise? Does the probe need to be checked in each exhaust? At the mo I set the needles level. It runs fine although I think it is a bit rich. Cheers Mark

[Tdm]

Should be on the panel above and near the battery Terry.

Nope - haven't got one on my car, and no sign of there ever being one there.

[trunt]

From what I have learned in the USA where cars are emission checked from 1968 --

CO is how rich its running, so adjusting the needles/mixture should bring it back, any carb can achieve 4.5 as long as everything is in good shape.
I have not got into adjusting the Stag carbs yet but normally you can tell if one or the other is rich if you raise the piston a little and the engine will stall, rev up or raise then drop which tells you how each individual carb is running.

HC is how much unburned fuel is in the exhaust. I have found that this was more problematic of the two.. It could be caused by a bad spark, bad compression or anything that caused some of the fuel to not ignite. One of the things to try is to retard the ignition (which will cause the engine to slow down) and raise the idle setting to compensate. This flows more air through the system which can help with atomisation of the fuel and clear out pools of fuel. (try revving it up a bit just before the test to clear pools of fuel)

Terry